I still think the discussion needs to be nuanced and needs to be a case-by-case basis, both player an organization.
I feel like Montreal, or any high pressure market, is not a place to roll the dice on whether they are ready. If we were to dive into looking at the development success stories from Bergevin era, there seems to be a common trend of the players being dominant in previous stage prior to joining Montreal. They also produced almost immediately and kept a consistent role.
1) Gallagher ended junior as one of the few prospects in recent history with 3 straight 40+ goal seasons in WHL before 20. Due to lockout started in AHL and was named an all star. Once the season started started producing right out of the gate and never looked back.
2) Suzuki played his final 2 years in OHL, lit up the playoffs in his final year. Came in as a rookie and after his first 6 games with only 1 point, started to produce (had 12 points in next 20 games to end of November). They kept giving him icetime and PP minutes and they have not really punished him for those cold streaks where he looks like he's not trying.
3) Caufield played in NCAA at age 18/19, dominated in his 2nd year. Signed contract and started producing right away. They kept giving him offensive opportunity and if they leave him with Suzuki/with 1st PP time this season I think they are doing him right. If they start benching him and putting him on 4th line with no PP time, I'd be saying he is better off in AHL working on whatever they feel he is lacking against easier competition.
Tinordi/Juulsen/Fleury/Mete/DLR/McCarron/Romanov/Kotkaniemi are all players who for whatever reason all played in NHL at young age without ever really being that good to begin with yet in their previous stage. They all looked like they can be a NHL regulars. I hope I'm wrong with Romanov but I really don't like the path they are taking with him and feel like they are better off leaving him in KHL to actually be a top 4 D or play him in AHL as top pairing. It's very reminiscent of Mete and it's easy to forget how highly regarded he was as a rookie. I really hope they leave Norlinder off this roster.